中国科学院机构知识库网格系统: 检索

A compact symmetric radio source born at one-tenth the current age of the Universe 期刊论文 OAI收割
Monthly Notices of the Royal Astronomical Society, 2022, 卷号: 511, 期号: 3, 页码: 4572-4581
作者: An, Tao; Wang, Ailing; Zhang, Yingkang; Aditya, J. N. H. S.; Hong, Xiaoyu

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收藏 | 浏览/下载：28/0 | 提交时间：2023/06/19

instrumentation: high angular resolution methods: observational galaxies: individual: J1606+3124 galaxies: jets galaxies: nuclei active galactic nuclei all-sky survey steep-spectrum black-holes luminosity function evolution galaxies scale redshift catalog Astronomy & Astrophysics

A study on the validity of the first Born approximation for high-energy electron scattering with nitrogen molecules 期刊论文 OAI收割
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2019, 卷号: 52, 期号: 24, 页码: -
作者: Kang, X; Xu, LQ; Liu, YW; Wang, SX; Yang, K

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收藏 | 浏览/下载：108/0 | 提交时间：2020/10/16

LYMAN-BIRGE-HOPFIELD GENERALIZED OSCILLATOR-STRENGTHS CROSS-SECTIONS HIGH-RESOLUTION EXCITATION TRANSITIONS BAND COLLISIONS SPECTRUM ATOMS

VLBI Studies of DAGN and SMBHB Hosting Galaxies 期刊论文 OAI收割
RADIO SCIENCE, 2018, 卷号: 53, 期号: 10, 页码: 1211-1217
作者: An, T.; Mohan, P.; Frey, S.

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收藏 | 浏览/下载：56/0 | 提交时间：2019/05/23

Dual Agn Supermassive Black Hole Binary Vlbi Observations Flat Spectrum Radio Cores High-resolution Imaging Source Compilation

OSCILLATOR STRENGTHS OF VIBRIONIC EXCITATIONS OF NITROGEN DETERMINED BY THE DIPOLE (gamma, gamma) METHOD 期刊论文 OAI收割
ASTROPHYSICAL JOURNAL, 2016, 卷号: 819, 期号: 2, 页码: —
作者: Liu, YW; Kang, X; Xu, LQ; Ni, DD; Yang, K

收藏 | 浏览/下载：134/0 | 提交时间：2016/09/12

EXTREME-ULTRAVIOLET EMISSION ENERGY-LOSS SPECTRUM HIGH-RESOLUTION ELECTRON-IMPACT CROSS-SECTIONS ABSORPTION-SPECTRUM N-2 TRANSITIONS STATE BAND

Three-dimensional numerical study of the acoustic properities of a highly underexpanded jet 会议论文 OAI收割
20th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2015, Glasgow, United kingdom, July 6, 2015 - July 9, 2015
作者: Wu K(吴坤); Li XP(李晓鹏); Yao W(姚卫); Fan XJ(范学军)

收藏 | 浏览/下载：44/0 | 提交时间：2017/05/05

Frequency spectrum analysis High temporal resolution Instantaneous flow Noise generation mechanisms Theoretical modeling Three dimensional numerical studies Transport mechanism Under expanded jets

Design of Airborne Dual Channel Ultraviolet-Visible Imaging Spectrometer with Large Field of View, Wide Spectrum, and High Resolution 期刊论文 OAI收割
spectroscopy and spectral analysis, 2013, 卷号: 33, 期号: 12, 页码: 3432-3436
作者: Hao Ai-hua; Hu Bing-liang; Bai Jia-guang; Li Li-bo; Yu Tao

收藏 | 浏览/下载：91/0 | 提交时间：2015/06/08

Large field of view Wide spectrum High resolution Ultraviolet Imaging spectrometer

Simulation and experiment of the static FTIR based on micro multi-step mirrors (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
作者: Liang Z.-Z.; Zhang J.; Zhang J.; Zhang J.; Zhu W.-B.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

In recent years Fourier transform spectrometer (FTS) with small size and low mass is required in many applications with growing need for real-time and small platform spectral detection. In this paper a micro Fourier transform infrared spectrometer (FTIR) based on spatial modulation mode was designed. This spectrometer has the advantages of high stability and simplified configuration. It also promises optical path differences (OPD) with high precision as MOEMS technology is used in manufacturing the key components. The simulation and the experiments with regard to this FTIR configuration have been done. Firstly the diffraction effect of the micro multi-step mirrors (MMSMs) is studied. We discuss the influence to the reversed spectrum by different mirror widths and different diffraction distances. Secondly we simulate and analyze the influence of the source solid angle to the spectral resolution. Thirdly we set up the theoretical model of the collimation error which is mainly from the defocus of the optical system and analyze the result caused by the collimation error. Fourthly a new discrete Fourier transform arithmetic using least-squares cosines progression (LSCP) is proposed which can reconstruct the spectrum with nonuniform sampled signals. Finally the MMSMs are fabricated used the MOEMS technology and the structural parameters are tested. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Design and demonstration of micro multi-step mirrors and light source in micro FTIR (EI CONFERENCE) 会议论文 OAI收割
6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2011, February 20, 2011 - February 23, 2011, Kaohsiung, Taiwan
Liang Z.; Fu J.; Feng C.; Liang J.

收藏 | 浏览/下载：49/0 | 提交时间：2013/03/25

To obtain high resolution high signal-to-noise ratio (SNR) high reliability and real time in wide spectral range we study the space modulation Micro Fourier Transform Spectrometer (FTS) based on multi-step mirrors covering the spectral range of 3-5m and 8-12 m in theory and experiment. The influences of spectrum reconstruction caused by the diffraction and extended light source in Fourier Transform Infrared Spectrometer (FTIR) are analyzed. A method to reduce the noises in spectrum reconstruction and the relationship between coherent intensity and solid angle of light source are discussed. An extended light source with suitable size is chosen considering the requirement of SNR and spectrum resolving power in the optical design. Furthermore the fabrication of micro multi-step mirrors which is the core part of FTS is investigated. Three methods for fabricating multi-step micro mirrors are demonstrated. 2011 IEEE.

Micro assembled fourier transform spectrometer (EI CONFERENCE) 会议论文 OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China
作者: Liang J.-Q.; Zhang J.; Zhang J.; Zhang J.; Wang B.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

With the trend of minimization of Fourier transform spectrometer (FTS) which is particularly pronounced in many applications a model of a micro FTS with no moving parts is proposed and analyzed. During analyzng the gradients which mainly introduce phase error are accounted. Based on these assumptions and the improved Mertz phase correcting method the spectrum of signal is simulated with real extended light source. The resolution can be up to 3.43nm@800nm with high signal-to-noise ratio (SNR) limiting resolving ability 6.8dB. In addition the fabrication method of components are illuminated and demonstrated which can not only make it bear some advantages over conventional micro dispersive spectrometers but also afford some new concepts on the design of spectrometers with improved performance. 2009 SPIE.

Optical system design with high resolution and large field of view for the remote sensor (EI CONFERENCE) 会议论文 OAI收割
Chang J.; Weng Z.-C.; Wang Y.-T.; Cheng D.-W.; Jiang H.-L.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

In this paper we are presenting a design method and its results for a space optical system with high resolution and wide field of view. This optical system can be used both in infrared and visible configurations. The designing of this system is based on an on-axis three-mirror anastigmatic (TMA) system. Here the on-axis concept allows wide field of view (FOV) enabling a diversity of designs available for the Multi-Object Spectrometer instruments optimized for low scattered and low emissive light. The available FOVs are upto 1 in both spectrum ranges whereas the available aperture range is F/15 - F/10. The final optical system is a three-mirror telescope with two on-axis and one off-axis segment and its resolution is 0.3m or even lower. The distinguished feature of this design is that it maintains diffraction-limited image at wide wavelengths. The technological developments in the field of computer generated shaping of large-sized optical surface details with diffraction-limited imagery have opened new avenues towards the designing techniques. Such techniques permit us to expand these technological opportunities to fabricate the aspherical off-axis mirrors for a complex configuration.